Why do people get allergies?

People are said to have allergies when their bodies have a negative reaction to a foreign substance.

According to the Mayo Clinic, antibodies protect us from unwanted bacteria that could cause infection. When a person has allergies, their antibodies are reacting to a substance that it thinks is harmful, even when it isn’t.

Some common allergens are foods (like peanuts, shellfish, and dairy products), medications and insect stings.

Distributed by Internet Broadcasting. This material may not be published, broadcast, rewritten or redistributed.